Hood Switch

Engine, hood switch

Fault symptom
The alarm does not sound when the hood is opened and the alarm is armed.

Action
1 Check the function, open/closed hood
Connect the ISAT scan tool.
Select "READ VALUES".
Select "BONNET".
Open/dose the hood and check the ISAT scan tool display at the same time.
The ISAT scan tool should display "OPEN" or "CLOSED", respectively.

If the ISAT scan tool display is correct for open/closed hood, the fault is intermittent, proceed to point 5. If not, proceed to point 2.

2 Check the voltage, open/closed hood
Unplug the connector to the hood switch.
Ignition "ON" (+15).
Repeat the ISAT scan tool commands as in point 1.
When the connector is open, the ISAT scan tool should display "OPEN".
Connect jumper between the respective connector pins and a safe grounding point.
The ISAT scan tool should display "CLOSED".
If this works correctly, proceed to point 3.
If this does not work. proceed to point 4.







3 Check the hood switch
Select "BONNET".
Connect jumper between both the pins in the connector.
The ISAT scan tool should display "CLOSED".
If the ISAT scan tool shows "CLOSED", change the hood switch.
If not, conduct a continuity test and take action between the hood switch connector, pin 2 and grounding point G30.
4 Check the cable assembly
Conduct a continuity' test on the cable assembly between the hood switch connector, pin 1 and the theft alarm control module, pin 16.
The resistance should be <1 Ohm.
If the resistance is incorrect, remedy the fault in the cable assembly.
If the resistance is correct, proceed to point 5.

5Final test
Check to see if the fault symptom remains.
If the problem remains, proceed to "Before Changing the Electronic Control Module". Before Changing the Electronic Control Module